Note the date - prices have changed a fair bit now (2009).
mytyres.co.uk have Continentals at less than £50 in 165-15, and others as low as £35 incl. shipping and VAT but not fitting - sounds good, but check your local tyre place as well.

Michelin XZX classic tyres, in our stock size of 165x15 are listed on the Longstone Tyres site at £65.00 each + VAT, with free carriage or free fitting/balancing from Longstone Tyres (Craig Barrowcliffe).